T-Mobile has announced the third phase of its Un-carrier initiative, which is no extra charge for international data and text. From the looks of it, this move will help T-Mobile's customers traveling abroad save some serious cash. But just how much will your wallet thank you compared to the likes of AT&T, Sprint and Verizon?

Under T-Mobile's new plan, you'll pay no extra fees for using data overseas. That means whatever data you consume will come out cot you your usual $60 for 2.5GB of data or $70 for unlimited data. If you're looking for high-speed data, though, you'll have to fork over $15 for 100MB or 1 day of data. Need more? You can also pay $25 for 200MB or 1 week of data or $50 for 500MB or 2 weeks of data.

Currently, under AT&T's Global Add-on Package plan, users can expect to pay an additional $30 per 120MB of data or $120 per 800MB. Go over your data limit and you'll be charged and $30 per 120MB

Sprint charges $40 for 40MB of data or $80 for 85MB of data under its Multi-country Data Roaming plan. If you're on Verizon, you can expect to pay as much as $25 for 100MB of data under the carrier's Global Data Feature. If you don't sign up for the plan, you'll pay $20.48 per MB.

Even when you add in the cost of T-Mobile's Speed Pass plans for higher-speed data, you'll wind up paying half as much on T-Mobile versus AT&T for nearly the same amount of data (100MB vs 120MB). And if you pay $25 per month on T-Mobile for 200 MB, you'll get nearly twice as much data versus AT&T for $5 less.

We'd like to know how fast normal data speeds are under T-Mobile's plans without the Speed Pass option, but any way you slice it the carrier's new international offering looks like a pretty good deal.